The CityLIFE Challenge has been running for 4 weeks so far and the level of entries is remarkable. Most of them are still in conceptual / initial modeling stages, but the attention to the design and the diversity of the concepts is more then I could have wished for. The challengers take the design stages very seriously and I think it could be of great interest here too.

Here are 4 of the entries that you can directly visit, and I invite you to browse the main challenge Grid Flow (http://challenge.ronenbekerman.com/citylife) and see what is going on ;)